CISAC has compiled the list below of over 1,700 species known to be invasive in California or a potential threat for introduction to the state. Please use the comment form below to let us know about: taxa that should be added or removed; species information that you would change; and species that you think should be a high priority for having a scorecard completed (choose Review Scorecards to see the list of scorecards already drafted). Make sure to click Save. Previous comments are displayed at the bottom of the page.
Download Species List (.csv) (to open in a Spreadsheet program)
This data download is provided to aid in the review of the draft invasive species list. We discourage other use of this data until it has been revised and finalized.
| Scientific Name | Common Name | Type | Subtype | Extent |
Risk of Introduction |
First Source | |
|---|---|---|---|---|---|---|---|
| Alyssum corsicum | yellowtuft | plant | herbaceous | not present | moderate | OR Weed List | |
| Phragmites australis | common reed | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Zygophyllum fabago | Syrian beancaper | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Arctium minus | common burdock | plant | herbaceous | limited | n/a (already in CA) | CO Weed List | |
| Oryza rufipogon | red rice | plant | grass | limited | n/a (already in CA) | CDFA | |
| Helianthus ciliaris | blueweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Scolymus hispanicus | golden thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Solanum dimidiatum | Torrey's nightshade | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Solanum marginatum | white-margined nightshade | plant | woody | limited | n/a (already in CA) | CDFA | |
| Sonchus arvensis | perennial sowthistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Sphaerophysa salsula | Austrian peaweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Abutilon theophrasti | velvet leaf | plant | herbaceous | widespread | n/a (already in CA) | Weeds of CA | |
| Acroptilon repens | Russian knapweed | plant | herbaceous | widespread | n/a (already in CA) | MT Weed List | |
| Aegilops triuncialis | barb goatgrass | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Ageratina adenophora | croftonweed | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Agrostis avenacea | Pacific bentgrass | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Agrostis stolonifera | creeping bentgrass | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Ailanthus altissima | tree-of-heaven | plant | woody | widespread | n/a (already in CA) | Cal-IPC list | |
| Amaranthus albus | prostrate pigweed | plant | herbaceous | widespread | n/a (already in CA) | Weeds of CA | |
| Amaranthus hybridus | slim amaranth | plant | herbaceous | widespread | n/a (already in CA) | Weeds of CA | |
| Amaranthus retroflexus | redroot amaranth | plant | herbaceous | widespread | n/a (already in CA) | Weeds of CA | |
| Ammophila arenaria | European beachgrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Anoda cristata | spurred anoda | plant | herbaceous | limited | n/a (already in CA) | CO Weed List | |
| Anthemis cotula | mayweed chamomile | plant | herbaceous | widespread | n/a (already in CA) | CO Weed List | |
| Anthoxanthum odoratum | sweet vernalgrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Arctotheca calendula (sterile) | sterile capeweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Arundo donax | giant reed | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Atriplex semibaccata | Australian saltbush | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Avena barbata | slender wild oat | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Avena fatua | wild oat | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Bassia hyssopifolia | fivehook bassia | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Bellardia trixago | bellardia | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Brassica nigra | black mustard | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Brassica rapa | birdsrape mustard | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Brassica tournefortii | Saharan mustard | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Briza maxima | big quackingrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Bromus diandrus | ripgut brome | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Bromus hordeaceus | soft brome | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Bromus japonicus | Japanese brome | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Bromus madritensis ssp. rubens | red brome | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Bromus tectorum | downy brome | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Cabomba caroliniana | Carolina fanwort | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cakile maritima | European sea-rocket | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Capsella bursa-pastoris | shepard's purse | plant | herbaceous | widespread | n/a (already in CA) | Weeds of CA | |
| Cardaria draba | hoary cress | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cardaria pubescens | hairy whitetop | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Carduus pycnocephalus | Italian thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Carduus tenuiflorus | slenderflower thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Carpobrotus edulis | iceplant | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Carthamus lanatus | woolly distaff thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cenchrus echinatus | southern sandbur | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Centaurea calcitrapa | purple starthistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Centaurea debeauxii | meadow knapweed | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Centaurea diffusa | diffuse knapweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Centaurea melitensis | Malta starthistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Centaurea solstitialis | yellow starthistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Centaurea virgata ssp. Squarrosa | squarrose knapweed | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Chrysanthemum coronarium | crown daisy | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Cichorium intybus | chicory | plant | herbaceous | widespread | n/a (already in CA) | CO Weed List | |
| Cirsium arvense | Canada thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cirsium vulgare | bull thistle | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Conicosia pugioniformis | narrowleaf iceplant | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Conium maculatum | poison-hemlock | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Convolvulus arvensis | field bindweed | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Conyza bonariensis | asthmaweed | plant | herbaceous | widespread | n/a (already in CA) | Weeds of CA | |
| Cortaderia jubata | jubatagrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Cortaderia selloana | pampasgrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Cotoneaster franchetii | orange cotoneaster | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Cotoneaster lacteus | Parney's cotoneaster | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Cotoneaster pannosus | silverleaf cotoneaster | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Cotula coronopifolia | brassbuttons | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Crataegus monogyna | hawthorn | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Cynara cardunculus | artichoke thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cynodon dactylon | bermudagrass | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Cynoglossum officinale | houndstongue | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Cynosurus echinatus | hedgehog dogtailgrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Cyperus difformis | variable flatsedge | plant | herbaceous | limited | n/a (already in CA) | Weeds of CA | |
| Cyperus rotundus | purple nutsedge | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cytisus scoparius | Scotch broom | plant | woody | widespread | n/a (already in CA) | CDFA | |
| Cytisus striatus | Portuguese broom | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Dactylis glomerata | orchardgrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Daucus carota | wild carrot | plant | herbaceous | widespread | n/a (already in CA) | WA Weed List | |
| Delairea odorata | Cape-ivy | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Descurainia sophia | flixweed | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Digitalis purpurea | foxglove | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Digitaria sanguinalis | hairy crabgrass | plant | grass | widespread | n/a (already in CA) | Weeds of CA | |
| Dipsacus fullonum | common teasel | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Dipsacus sativus | fuller's teasel | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Dittrichia graveolens | stinkwort | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Echinochloa colona | jungle rice | plant | grass | widespread | n/a (already in CA) | Weeds of CA | |
| Echinochloa oryzicola | early watergrass | plant | grass | limited | n/a (already in CA) | Weeds of CA | |
| Echinochloa phyllopogon | rice barnyardgrass | plant | grass | limited | n/a (already in CA) | Weeds of CA | |
| Echium candicans | pride-of-Madeira | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Egeria densa | Brazilian egeria | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Ehrharta calycina | purple veldtgrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Ehrharta erecta | erect veldtgrass | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Eichhornia crassipes | water hyacinth | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Elaeagnus angustifolia | Russian-olive | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Emex spinosa | devil's-thorn | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Erechtites glomerata | Australian fireweed | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list |
